The Elders of the Creek, The Elders Three (as they refer to themselves), or simply The Elders, are a group of teenage boys that hang out in The Creek. They are some of the oldest residents of The Creek and claim to have been there longer than anyone. They give "great, ancient wisdom," as Craig puts it, in return for tribute. They've also been seen getting snacks at The Trading Tree and playing Bring Out Your Beast at The Splintery Butt.
Their base is a grotto they call Elder Rock; it is reached from a path on the side of The Creek lit by torches. The inside is lit by holiday lights and a lantern. The decor consists of a game table, folding chairs, a beanbag chair, rugs, a small bookcase, and a bin with live action role-play weapons inside; also seen in the grotto are books, comics, figurines, and various collectibles. They also love anime.
- "You're It"
- "Bring Out Your Beast"
- "Kelsey Quest"
- "Power Punchers"
- "Dibs Court"
- "Kelsey the Elder"
- "Stink Bomb"
- "Secret in a Bottle"
- "Trading Day" (Mark only)
- "Crisis at Elder Rock"
- "The End Was Here"
- "In the Key of the Creek"
- "Ferret Quest" (Mark only) (mentioned)
- "The Jinxening" (mentioned)
- They play tabletop games like Dungeons & Dragons and trading card games like Bring Out Your Beast.
- There is a box in Elder Rock with the text "Journey" on it; this is possibly a reference to the board game Journey: Wrath of Demons.
- There is a poster in Elder Rock with the text "Sadboy Pilotgeddon" on it; this is a parody of the anime Neon Genesis Evangelion.
- The show's creators, Ben Levin and Matt Burnett, voice Mark and Barry, respectively.
- The Elders of the Creek have appeared in Ben Levin and Matt Burnett's previous works, including I'm In Ur Manger Killing Ur Savior, Ronin Dojo Community College DX: The Digital Pirates of Dark Water Saga, and H.P. Papercraft.
- The Elders of the Creek have watched Codename: Kids Next Door, Ed, Edd n Eddy, and various shows produced by Hanna-Barbera.
- The Elders don't seem to care that it is "socially unacceptable" for high schoolers to hang out at the Creek.